The Secret Cipher Cases

"In 1953, a man was found dead from cyanide poisoning near the Philadelphia airport with a picture of a Nazi aircraft in his wallet. Taped to his abdomen was an enciphered message. In 1912, a book dealer named Wilfrid Voynich came into possession of an illuminated cipher manuscript once belonging to Emperor Rudolf II, who was obsessed with alchemy and the occult. Wartime codebreakers tried--and failed--to unlock the book's secrets, and it remains an enigma to this day. In this lively and entertaining book, Craig Bauer examines these and other vexing ciphers yet to be cracked. Some may reveal the identity of a spy or serial killer, provide the location of buried treasure, or expose a secret society--while others may be elaborate hoaxes. Unsolved! begins by explaining the basics of cryptology, and then explores the history behind an array of unsolved ciphers. It looks at ancient ciphers, ciphers created by artists and composers, ciphers left by killers and victims, Cold War ciphers, and many others. Some are infamous, like the ciphers in the Zodiac letters, while others were created purely as intellectual challenges by figures such as Nobel Prize-winning physicist Richard P. Feynman. Bauer lays out the evidence surrounding each cipher, describes the efforts of geniuses and eccentrics--in some cases both--to decipher it, and invites readers to try their hand at puzzles that have stymied so many others. Unsolved! takes readers from the ancient world to the digital age, providing an amazing tour of many of history's greatest unsolved ciphers"--

King & Kayla are back on the case in this laugh-out-loud mystery from the Theodor Seuss Geisel Honor Award-winning series. King and Kayla receive a mysterious letter written in code. Mason received an almost identical letter. How can they crack the code? Kayla notices that there aren't any vowels in most of the words; you can't write words without vowels. When she compares her letter to Mason's, only one word is different. Sensitive King notices that the letter smells like Jillian. Why would Jillian write them letters in code? With simple, straightforward language and great verbal and visual humor, the King & Kayla series is perfect for newly independent readers. King and Kayla model excellent problem-solving skills, including working as a team, gathering facts, making lists, and evaluating evidence.

X is the New York Times number 1 bestseller and thrilling, twenty-fourth book in the Kinsey Millhone Alphabet series from Sue Grafton. In hindsight, I marvel at how clueless I was . . . What I ask myself even now is whether I should have picked up the truth any faster than I did, which is to say not fast enough . . . When a glamorous red head wishes to locate the son she put up for adoption thirty-two years ago, it seems like an easy two hundred bucks for private investigator Kinsey Millhone. But when a cop tells her she was paid with marked bills, and Kinsey's client is nowhere to be found, it becomes apparent this mystery woman has something to hide. Riled, Kinsey won't stop until she's found out who fooled her and why. Meanwhile, the widow of the recently murdered P. I. – and Kinsey's old friend – Pete Wolinsky, needs help with her IRS audit. This seemingly innocuous task takes a treacherous turn when Kinsey finds a coded list amongst her friend's files. It soon leads her to an unhinged man with a catalogue of ruined lives left in his wake. And despite the devastation, there isn't a single conviction to his name. It seems this sociopath knows exactly how to cause chaos without leaving a trace. As Kinsey delves deeper into the investigation she quickly becomes the next target of this tormentor. But can Kinsey prove her case against him before she becomes the next victim?

Explains various methods used in cryptography and presents examples to help readers in breaking secret codes

When Willie, confined to a wheelchair, receives coded messages signed "G.O.D." on his computer, he needs the help of the other Shoebox Kids, as well as prayer, to identify the writer and find Willie's missing dog.

King & Kayla are back on the case in this laugh-out-loud mystery from the Theodor Seuss Geisel Honor Award-winning series. King and Kayla receive a mysterious letter written in code. Mason received an almost identical letter. How can they crack the code? Kayla notices that there aren't any vowels in most of the words; you can't write words without vowels. When she compares her letter to Mason's, only one word is different. Sensitive King notices that the letter smells like Jillian. Why would Jillian write them letters in code? With simple, straightforward language and great verbal and visual humor, the King & Kayla series is perfect for newly independent readers. King and Kayla model excellent problem-solving skills, including working as a team, gathering facts, making lists, and evaluating evidence.

In today's extensively wired world, cryptology is vital for guarding communication channels, databases, and software from intruders. Increased processing and communications speed, rapidly broadening access and multiplying storage capacity tend to make systems less secure over time, and security becomes a race against the relentless creativity of the unscrupulous. The revised and extended third edition of this classic reference work on cryptology offers a wealth of new technical and biographical details. The book presupposes only elementary mathematical knowledge. Spiced with exciting, amusing, and sometimes personal accounts from the history of cryptology, it will interest general a broad readership.

A debut entry in an alternate-history series depicts three kids who try to solve a modern-world puzzle and complete a treasure hunt laid into the streets and buildings of New York City.

A thoughtful and provocative fiction story about the science of secret codes and error correction. Sara, Derek and Jared have devised their own simple code to communicate with each other in class at school. When a written, coded message is amended en route to Sara and she gets into trouble, they start to explore how their simple code could use error correction to protect themselves against tampering by somebody.This is all a private hobby, until one day, on a school trip to a bank the class is caught up in an attempted bank robbery. Suddenly Sara, Derek and Jared's playing with codes - and with methods of error correction - has an urgent reality. The Secret Code Menace is part of the Cold Fusion series, published by Ransom Publishing, a specialist children's publisher. The series is designed for more able readers, gifted and talented children, and those who are curious, enjoy a challenge and like thinking outside the box. The Secret Code Menace is ideal for more able readers aged 9 - 12 with a reading age of 12 + .